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There's a hierarchy in the adoption of new techniques and approaches, particularly in the b2b setting:

You were right all along: The thing you were waiting for is here.

All of the cool kids are using this now: Take a look at the folks who are already on board. That topic you didn't care about so much–you need to care about it now.

Well, you were wrong, but don't worry about it, here's some cover: I know you said that this would never work, but it's working. The good news is that you can talk about how your open-mindedness lets you leap forward now.

It's almost impossible to get someone to try something new today if they also have to admit that they were wrong yesterday.